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- W2156730686 abstract "We describe and validate an automated model that retrieves subpixel snow-covered area and effective grain size from Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) data. The model analyzes multiple endmember spectral mixtures with a spectral library of snow, vegetation, rock, and soil. We derive snow spectral endmembers of varying grain size from a radiative transfer model; spectra for vegetation, rock, and soil were collected in the field and laboratory. For three AVIRIS images of Mammoth Mountain, California that span common snow conditions for winter through spring, we validate the estimates of snow-covered area with fine-resolution aerial photographs and validate the estimates of grain size with stereological analysis of snow samples collected within 2 h of the AVIRIS overpasses. The RMS error for snow-covered area retrieved from AVIRIS for the combined set of three images was 4%. The RMS error for snow grain size retrieved from a 3×3 window of AVIRIS data for the combined set of three images is 48 μm, and the RMS error for reflectance integrated over the solar spectrum and over all hemispherical reflectance angles is 0.018." @default.
- W2156730686 created "2016-06-24" @default.
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- W2156730686 date "2003-04-01" @default.
- W2156730686 modified "2023-09-30" @default.
- W2156730686 title "Retrieval of subpixel snow-covered area and grain size from imaging spectrometer data" @default.
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- W2156730686 doi "https://doi.org/10.1016/s0034-4257(02)00187-6" @default.
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